Issue #8040 has been updated by Chris Price.
John, thanks for the comments. Rest assured that backwards compatibility is a huge concern for us. The last comment that you replied to was speaking more to the idea of "how would the language look if we were designing it from scratch?" It is unlikely that we will drastically change the meaning of any of the existing keywords, and if we change them at all there will most certainly be a deprecation warning for an extended period of time first. This ticket was being used to discuss ideas around this topic, but no action has been taken and none is scheduled at this time. Your feedback is appreciated and I expect that this will be discussed on the mailing lists in detail before any final decisions are made. ---------------------------------------- Bug #8040: Classes should be able to contain other classes to provide a self contained module https://projects.puppetlabs.com/issues/8040#change-68418 Author: Jeff McCune Status: Accepted Priority: Normal Assignee: Category: compiler Target version: Affected Puppet version: 2.6.0 Keywords: anchor containment contain graph modules module self-contained dependency reuse usability forge Branch: # Overview # As a module author, I want to build collections of classes for end users shipped as a module. As a module end-user, I want to manage resources before and that require the collection of classes as a self contained unit of functionality. For example, the end user wants to use a module I write in the following way: <pre> node default { class { 'java': } -> class { 'activemq': } -> class { 'mcollective: } } </pre> Where java, activemq, and mcollective are all discrete modules with multiple classes each. For example, a each module has a class for the packages, a class for the configuration files, and a class for the running service if there is a service. With Puppet 2.6, when a class declares another class, the classes are not related to each other in any way, containment or dependency. # Expected Behavior # The example illustrates the expectation that all resources in the activemq module are managed after all resources in the java module and before all resources in the mcollective module. # Actual Behavior # Without the Anchor Pattern, when class activemq::service is declared from within class activemq, the resources float away and are not transitively related to java or mcollective. # Suggested Implementation # It has been expressed that it may be a viable solution for module authors to be able to specify containment edges in the graph from within the Puppet DSL. With Puppet 2.6.x and 2.7.x this is not possible. The Anchor Pattern works around this problem by specifying relationship edges to a resource contained within the composite class. # Work Around # The Anchor Pattern is the current work around for Puppet 2.6.x When a class declares other classes, it should contain them using this pattern: <pre> class activemq { anchor { 'activemq::begin': } anchor { 'activemq::end': } class { 'activemq::package': require => Anchor['activemq::begin'], } class { 'activemq::config': require => Class['activemq::config'], notify => Class['activemq::service'], } class { 'activemq::service': before => Anchor['activemq::end'], } } </pre> -- Jeff McCune Puppet Labs @0xEFF -- You have received this notification because you have either subscribed to it, or are involved in it. To change your notification preferences, please click here: http://projects.puppetlabs.com/my/account -- You received this message because you are subscribed to the Google Groups "Puppet Bugs" group. To post to this group, send email to puppet-bugs@googlegroups.com. To unsubscribe from this group, send email to puppet-bugs+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/puppet-bugs?hl=en.
